Normalization ________ data duplication. eliminates maximizes increases reduces TRUE ANSWER : ? YOUR ANSWER : ?
One common design problem when designing a database from existing data is the use of a single cell in one column to store multiple values of an attribute. False True TRUE ANSWER : ? YOUR ANSWER : ?
Each answer below shows example data from a table. Which answer is an example of the missing values problem? Three rows have the values Brown, NULL, and Blue in the same column. One row has the value "He is interested in a Silver Porsche from the years 1978-1988" in a column. Three rows have the values Brown Small Chair, Small Chair Brown, and Small Brown Chair in the same column. Three columns have the values 534-2435, 534-7867, and 546-2356 in the same row. TRUE ANSWER : ? YOUR ANSWER : ?
The design guidelines and priorities for read-only databases are different because read-only databases are never updated. True False TRUE ANSWER : ? YOUR ANSWER : ?
When assessing the table structure of an acquired set of tables with data, determining primary keys is (part of) the: third step. fourth step. first step. second step. TRUE ANSWER : ? YOUR ANSWER : ?
If a table has been normalized so that all determinants are candidate keys, then that table is in: BCNF. 3NF. 2NF. 1NF. TRUE ANSWER : ? YOUR ANSWER : ?
Using the SQL GROUP BY phrase with a SELECT statement can help detect which of the following problems? The general-purpose remarks column problem The multivalue, multicolumn problem The inconsistent values problem The missing values problem TRUE ANSWER : ? YOUR ANSWER : ?
When building a database from an existing set of tables, we still need to consider normalization principles. False True TRUE ANSWER : ? YOUR ANSWER : ?
One common design problem when designing a database from existing data is the presence of missing values, called blank values, in received data. False True TRUE ANSWER : ? YOUR ANSWER : ?
Multivalued dependencies create harmless anomalies that should be noted, but do not always need to be eliminated. True False TRUE ANSWER : ? YOUR ANSWER : ?